Optimize PDF
Compress PDF
Reduce file size by re-rendering pages with controlled quality and scale.
File
No file
Upload a PDF to start
PDF remains on your device.
Tip: If your PDF is already optimized, size may not reduce much.
Compression Settings
Quality
0.70
Lower = smaller size, more blur.
Scale
1.0×
Lower scale reduces resolution.
Original
—
Quality
0.70
Scale
1.0×
Best range: Quality 0.60–0.75 and Scale 0.8–1.0.
Shrink a heavy PDF so it is easier to email or upload elsewhere, with control over quality. Compression runs on your device, so your file stays private the whole time.
How to compress pdf
- Drop in the PDF you want to make smaller.
- Choose a quality / compression level.
- Click Compress and let it rebuild the file locally.
- Download your smaller PDF.
Frequently asked questions
How can I reduce the size of a PDF for free?
Upload your PDF, pick a compression level and click Compress. The smaller file downloads instantly, free of charge.
Will compressing lower the quality?
You choose the level. Higher compression saves more space, while lighter settings keep text and images crisp.
Is it safe to compress confidential PDFs here?
Yes. Compression is done entirely in your browser, so sensitive documents never leave your device.
🔒 100% private: this tool runs entirely in your browser. Your files are never uploaded — they never leave your device.